O.K., time for the first approach. I´m still waiting for my copy of the book though, but in the meantime i thought it would be a good idea to think about some colour schemes here.
Yeah, i know the scale´s not right, i´ll fix that later . Hopefully cough

This shows the moment when Patricia realises the 7th Chamber doesn´t actually end.

You’ve really captured it Torsten, I have to say that so many people who are participating in this challenge (and it isn’t their fault if they haven’t read the book) are missing the ‘cylinder’ aspect of these chambers. The landscapes/cities wrap around 360 degrees overhead - well done!